Window sill extrusion



FIG. 1 is an end elevation view of a window sill extrusion embodying my new invention;

FIG. 2 is a top plan view of the extrusion shown in FIG. 1 shown fragmentarily to indicate indeterminate length;

FIG. 3 is a bottom plan view of the extrusion shown in FIGS. 1-2;

FIG. 4 is a front elevation view of the extrusion shown in FIGS. 1-3; and

FIG. 5 is a rear elevation view of the extrusion shown in FIGS. 1-4. 

The ornamental design for a window sill extrusion, substantially as shown and described. 